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Showing 1 to 20 of 158 for “"aeroelastic"”.
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Geometrically Nonlinear Aeroelastic Scaling
Aeroelastic scaling methodologies are developed for geometrically nonlinear applications. The new methods are demonstrated by designing an aeroelastically scaled model of a suitably nonlinear full-scale joined-wing aircraft. The best of the methods produce scaled models that closely replicate the …
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Strain actuated aeroelastic control
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Aeroelastic modelling of gyroplane rotors
… gyroplane accidents still remains unclear. The aeroelastic behaviour of autorotating rotors is a relatively unexplored problem and it has not yet been investigated as possible cause of the accidents. A mathematical model was created to simulate aeroelastic behaviour of rotors in autorotation. …
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Aeroelastic behaviour of composite wings
… investigations into the structural, dynamic and aeroelastic behaviour of composite wings. The study begins with a literature review where the development of aeroelastic tailoring and specific applications of the technology are discussed in detail. A critique of methods for the determination of …
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Aeroelastic Analysis of Membrane Wings
… 2-D VLM and a doublet lattice method. The aeroelasticity is studied by varying parameters affecting the flow as well as parameters affecting the structure. The parametric studies are performed for cases of constant angle of attack, plunge and, pitch and plunge. The response of the …
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Reduced-order modeling of aeroelastic phenomena
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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Aeroelastic optimization of thin flapping structure
We study the flow generated when a handheld fan is waved. This fluid-structure interaction problem is investigated through precision experiments, using an oscillating semi-circular elastic plate as a reduced analog model. The aerodynamic performance of the fans is systematically characterized for a …
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Towards optimal strain actuated aeroelastic control
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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Sensitivity analysis of wing aeroelastic responses
Design for prevention of aeroelastic instability (that is, the critical speeds leading to aeroelastic instability lie outside the operating range) is an integral part of the wing design process. Availability of the sensitivity derivatives of the various critical speeds with respect to shape …
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Identification of Transient Nonlinear Aeroelastic Phenomena
Complex nonlinear aspects of aeroelastic phenomena include unsteady nonlinear aerodynamic loads, structural nonlinearities, as well as nonlinear couplings between the flow and the structural response. Nonlinearities in aerodynamic loads originate from unsteady shocks and/or flow separation. …
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Aeroelastic Analysis of a Flexible Membrane Wing
… research proposal is the investigation of the aeroelastic effects of a flexible lift augmentation system (LAS) wing. This research involves characterization of the forced vibration response of a wing appendage used to augment short field take off and landing (STOL) operations.</p> <p>Although …
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Nonlinear Analysis and Control of Aeroelastic Systems
… may lead to limit cycle oscillations (LCOs) in aeroelastic systems. LCOs can result in fatigue in wings leading to catastrophic failures. Existence of LCOs for velocities less than the linear flutter velocity has been observed during flight and wind tunnel tests, making such subcritical behavior …
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A mm-scale aeroelastic oscillation-based anemometer
… By combining a 'fishtail'-shaped filament's aeroelastic and vortex-forced flutter modes, its oscillation frequency can be confined to scale smoothly with fluid velocity. This principle has been used to produce a low-cost, mm-scale anemometer that measures air flow to ±(5% + 0.5m/s) from …
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Aeroelastic study of a multi-hinged wing
Dynamic aeroelastic response of multi-segmented hinged wings is studied theoretically and experimentally in this thesis. For the theoretical study, a method of modeling the aeroelastic characteristics of multi-hinged wings is proposed. The method employs the Runge-Kutta scheme to solve the …
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It’s Not Just a Phase: Real-Time Aeroelastic Flutter Control Optical Flow Sensing and Piezoelectric Control of Aeroelastic Flutter
Aeroelastic flutter poses a critical threat to aircraft safety, occurring when aerodynamic forcescouple with structural dynamics to create potentially catastrophic, self-amplifying oscillations that lead to structural failure. Traditional active flutter detection and control methods rely on …
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Experimental and numerical study of hypersonic aeroelastic intakes
… the off-design intake operations due to aeroelasticity. An aeroelastic intake was tested in a hypersonic wind tunnel to assess its dynamic flowfield, structural response, and performance. The experiments were informed with static 2D, full-scale static 3D, and fully coupled 2D and 3D …
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A CFD framework for aeroelastic gust load calculations
… (CFD) framework for the simulation of the aeroelastic response of aircraft flying under gust loading was developed. The multiphysics, Finite Volume, VertexCentered code Elementaltextsuperscript{textregistered} was employed and calculations were performed for the transonic flow regime. In …
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Velocity scaled aeroelastic testing of an unducted fan
Bibliography: leaves 240-243.
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Aeroelastic studies on a high aspect ratio wing
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
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